1. Incidence and prevalence as measures of the frequency of congenital malformations and genetic outcomes: Application to oral clefts;Hook;Cleft Pal J,1988
2. Epidemiology: principles and methods;MacMahon,1970
3. Fetal malformations;Leck,1983
4. Malformations in children from one to seven years;Myrianthopoulos,1985
5. Malformations in children from one to seven years;Myrianthopoulos,1985